R. nakahari is normall brick-red to rose red species.

Nakahari "Pink E.S." is a cultivar of R. nakahari

Bloom Time: Late to Very Late

Height (ft.) in 10 Yrs: 1

Cold Hardiness Temperature: -5°F (-21°C)

Foliage /Habit Description: Leaves elliptic to elliptic-obovate, up to 1/2" long, both surfaces hairy. Prostrate shrub, creeping and very compact.

Evergreen azalea from Taiwan

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Photo courtesy www.tinytreasuresnursery.com

Here is a link that might be useful: Dwarf Pink Azalea Nakahari E.S.

I have grown them for years. They are easy to propagate from cuttings. They slowly spread and if used as a ground cover they can be difficult to keep weed free, even with a mulch. They bloom in late May for me here near Seattle.
The link shows one of mine about 10 years old.

Here is a link that might be useful: Nakahari Azalea